package chapter05.E8;

public class E8 {
    public static void main(String[] args) {
        System.out.println("1 添加---------");
        add();
        System.out.println("2 删除---------");
        add();
        System.out.println("3 修改---------");
        add();
    }
    public static void add(){
        StringBuffer sb = new StringBuffer();
        sb.append("itcast");
        System.out.println(sb);
        sb.insert(3,"123");
        System.out.println(sb);
    }
    public static void remove(){
        StringBuffer sb = new StringBuffer("itcastcn");
        sb.delete(1,5);
        System.out.println("删除指定位置结果:"+sb);
        sb.deleteCharAt(2);
        System.out.println("删除制定位置结果:"+sb);
        sb.delete(0, sb.length());//清空缓冲区
        System.out.println("清空缓冲区结果:"+sb);
    }
    public static void alter(){
        StringBuffer sb = new StringBuffer("itcastcn");
        sb.setCharAt(1,'p');
        System.out.println("修改指定位置字符结果:"+sb);
        sb.replace(1,3,"qq");
        System.out.println("替换指定位置字符串结果:"+sb);
        System.out.println("字符串翻转结果:"+sb.reverse());
    }
}
